diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f16df0..78f1b3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,16 @@ As this project is a user-facing application, the places in the semantic version
 
 ## [Unreleased]
 
+## [1.0.5] (2023-11-28)
+
+### Changed
+
+- Improved sync between source files and settings: set format from files, set name to corpus id
+
+### Fixed
+
+- Set `lang` param of Korp/Strix urls
+
 ## [1.0.4] (2023-10-24)
 
 ### Fixed
@@ -72,7 +82,8 @@ The frontend is now open to the general public! This version allows users to:
 
 Code changes up until this point are not documented other than in the git commit log.
 
-[unreleased]: https://github.com/spraakbanken/mink-frontend/compare/v1.0.4...HEAD
+[unreleased]: https://github.com/spraakbanken/mink-frontend/compare/v1.0.5...HEAD
+[1.0.5]: https://github.com/spraakbanken/mink-frontend/compare/v1.0.4...v1.0.5
 [1.0.4]: https://github.com/spraakbanken/mink-frontend/compare/v1.0.3...v1.0.4
 [1.0.3]: https://github.com/spraakbanken/mink-frontend/compare/v1.0.2...v1.0.3
 [1.0.2]: https://github.com/spraakbanken/mink-frontend/compare/v1.0.1...v1.0.2
diff --git a/package.json b/package.json
index aacbfaa..81e01f8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mink-frontend",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "license": "MIT",
   "scripts": {
     "dev": "vite",
diff --git a/src/api/corpusConfig.js b/src/api/corpusConfig.js
index a9f7164..4186e63 100644
--- a/src/api/corpusConfig.js
+++ b/src/api/corpusConfig.js
@@ -68,13 +68,13 @@ export async function makeConfig(id, options) {
     ],
   };
 
-  if (format === "xml") {
-    if (!textAnnotation) {
-      throw new TypeError("Text annotation setting is required for XML");
+  if (format == "xml") {
+    // The text annotation setting is required if XML, but it may be set later
+    if (textAnnotation) {
+      config.import.text_annotation = textAnnotation;
+      config.export.source_annotations = [`${textAnnotation} as text`, "..."];
     }
-    config.import.text_annotation = textAnnotation;
-    config.export.source_annotations = [`${textAnnotation} as text`, "..."];
-  } else if (format === "pdf") {
+  } else if (format == "pdf") {
     config.export.source_annotations = ["text", "page:number"];
   }
 
@@ -141,3 +141,14 @@ export async function parseConfig(configYaml) {
     ).params.value,
   };
 }
+
+/** Check if the config looks ready to run. May throw anything. */
+export function validateConfig(config) {
+  if (!config.format) {
+    throw new TypeError("Format missing");
+  }
+
+  if (config.format == "xml" && !config.textAnnotation) {
+    throw new TypeError("Text annotation setting is required for XML");
+  }
+}
diff --git a/src/corpus/corpusState.composable.js b/src/corpus/corpusState.composable.js
index 7a9229a..c3c8e5b 100644
--- a/src/corpus/corpusState.composable.js
+++ b/src/corpus/corpusState.composable.js
@@ -1,9 +1,10 @@
 import { computed } from "vue";
 import { useI18n } from "vue-i18n";
-import { FORMATS_EXT } from "@/api/corpusConfig";
+import { validateConfig } from "@/api/corpusConfig";
 import useConfig from "./config/config.composable";
 import useJob from "./job/job.composable";
 import useSources from "./sources/sources.composable";
+import { getException } from "@/util";
 
 /** The "corpus state" is related to the job status, but is more about predicting what action the user needs to take. */
 export function useCorpusState(corpusId) {
@@ -38,7 +39,7 @@ export function useCorpusState(corpusId) {
   });
 
   const isConfigValid = computed(
-    () => config.value && FORMATS_EXT.includes(config.value.format)
+    () => !getException(() => validateConfig(config.value))
   );
 
   const hasMetadata = computed(
diff --git a/src/corpus/createCorpus.composable.js b/src/corpus/createCorpus.composable.js
index e1d7f20..14700d1 100644
--- a/src/corpus/createCorpus.composable.js
+++ b/src/corpus/createCorpus.composable.js
@@ -1,12 +1,12 @@
 import { useRouter } from "vue-router";
 import { useAuth } from "@/auth/auth.composable";
 import useMinkBackend from "@/api/backend.composable";
-import { emptyConfig } from "@/api/corpusConfig";
 import { useCorpusStore } from "@/store/corpus.store";
 import useMessenger from "@/message/messenger.composable";
 import useConfig from "./config/config.composable";
 import useSources from "./sources/sources.composable";
 import useCorpus from "./corpus.composable";
+import { getFilenameExtension } from "@/util";
 
 export default function useCreateCorpus() {
   const corpusStore = useCorpusStore();
@@ -31,9 +31,18 @@ export default function useCreateCorpus() {
     const corpusId = await createCorpus().catch(alertError);
     if (!corpusId) return;
 
+    // Get file extension of first file, assuming all are using the same extension.
+    const format = getFilenameExtension(files[0]?.name);
+
+    // Create a minimal config.
+    const config = {
+      name: { swe: corpusId, eng: corpusId },
+      format,
+    };
+
     const results = await Promise.allSettled([
       uploadSources(files, corpusId),
-      uploadConfig(emptyConfig(), corpusId),
+      uploadConfig(config, corpusId),
     ]);
 
     const rejectedResults = results.filter(
diff --git a/src/corpus/exports/Exports.vue b/src/corpus/exports/Exports.vue
index f00deb8..7f4e252 100644
--- a/src/corpus/exports/Exports.vue
+++ b/src/corpus/exports/Exports.vue
@@ -16,7 +16,7 @@
         :link-text="$t('exports.tools.help.korp.manual.text')"
         :can-install="canInstall"
         :is-installed="korpStatus.isDone"
-        :show-url="`${korpUrl}?mode=mink#?corpus=${corpusId}`"
+        :show-url="`${korpUrl}?mode=mink#?corpus=${corpusId}&lang=${locale3}`"
         @install="korpInstall()"
       />
 
@@ -25,7 +25,7 @@
         :info="$t('exports.tools.help.strix')"
         :can-install="canInstall"
         :is-installed="strixStatus.isDone"
-        :show-url="`${strixUrl}?filters=corpus_id:${corpusId}&modeSelected=mink`"
+        :show-url="`${strixUrl}?modeSelected=mink&filters=corpus_id:${corpusId}&lang=${locale3}`"
         @install="strixInstall()"
       />
     </div>
@@ -67,6 +67,7 @@ import { useCorpusState } from "@/corpus/corpusState.composable";
 import useJob from "@/corpus/job/job.composable";
 import PendingContent from "@/spin/PendingContent.vue";
 import ToolPanel from "./ToolPanel.vue";
+import useLocale from "@/i18n/locale.composable";
 
 const corpusId = useCorpusIdParam();
 const { exports, loadExports, downloadResult, getDownloadFilename } =
@@ -74,6 +75,7 @@ const { exports, loadExports, downloadResult, getDownloadFilename } =
 const { isDone } = useCorpusState(corpusId);
 const { installKorp, installStrix, sparvStatus, korpStatus, strixStatus } =
   useJob(corpusId);
+const { locale3 } = useLocale();
 
 const korpUrl = ensureTrailingSlash(import.meta.env.VITE_KORP_URL);
 const strixUrl = ensureTrailingSlash(import.meta.env.VITE_STRIX_URL);
diff --git a/src/corpus/sources/SourceUpload.vue b/src/corpus/sources/SourceUpload.vue
index ff92c73..0f094a8 100644
--- a/src/corpus/sources/SourceUpload.vue
+++ b/src/corpus/sources/SourceUpload.vue
@@ -49,11 +49,13 @@
 
 <script setup>
 import { computed } from "vue";
+import { getFilenameExtension } from "@/util";
 import useMessenger from "@/message/messenger.composable";
 import useSources from "./sources.composable";
 import Filedrop from "./Filedrop.vue";
 import useCorpusIdParam from "@/corpus/corpusIdParam.composable";
 import UploadSizeLimits from "./UploadSizeLimits.vue";
+import useConfig from "../config/config.composable";
 
 const props = defineProps({
   fileHandler: {
@@ -68,13 +70,22 @@ const props = defineProps({
 
 const corpusId = useCorpusIdParam();
 const { uploadSources, extensions } = useSources(corpusId);
-const { clear, alertError } = useMessenger();
+const { config, uploadConfig } = useConfig(corpusId);
+const { alertError, clear } = useMessenger();
 const extensionsAccept = computed(() =>
   extensions.value?.map((ext) => `.${ext}`).join()
 );
 
 async function defaultFileHandler(files) {
-  return uploadSources(files).catch(alertError);
+  const requests = [uploadSources(files).catch(alertError)];
+
+  // Also update format setting in config if needed
+  const format = getFilenameExtension(files[0]?.name);
+  if (format != config.value.format) {
+    requests.push(uploadConfig({ ...config.value, format }));
+  }
+
+  await Promise.all(requests);
 }
 const fileHandler = props.fileHandler || defaultFileHandler;
 
diff --git a/src/corpus/sources/sources.composable.js b/src/corpus/sources/sources.composable.js
index 12ebe8d..f4ef9fc 100644
--- a/src/corpus/sources/sources.composable.js
+++ b/src/corpus/sources/sources.composable.js
@@ -3,6 +3,7 @@ import uniq from "lodash/uniq";
 import useMinkBackend from "@/api/backend.composable";
 import { useCorpusStore } from "@/store/corpus.store";
 import useMessenger from "@/message/messenger.composable";
+import { getFilenameExtension } from "@/util";
 
 export default function useSources(corpusId) {
   const corpusStore = useCorpusStore();
@@ -38,7 +39,7 @@ export default function useSources(corpusId) {
   const extensions = computed(() =>
     uniq(
       corpusStore.corpora[corpusId]?.sources?.map((source) =>
-        source.name.split(".").pop()
+        getFilenameExtension(source.name)
       )
     )
   );
diff --git a/src/i18n/locale.composable.js b/src/i18n/locale.composable.js
index 9b3e92e..70d450e 100644
--- a/src/i18n/locale.composable.js
+++ b/src/i18n/locale.composable.js
@@ -1,4 +1,4 @@
-import { inject, watch } from "vue";
+import { computed, inject, watch } from "vue";
 import { useI18n } from "vue-i18n";
 import { useStorage } from "@vueuse/core";
 import { filesize } from "filesize";
@@ -14,6 +14,9 @@ export default function useLocale() {
     document.querySelector("html")?.setAttribute("lang", locale.value);
   };
 
+  // The ISO 639-3 code is used in many parts of the Språkbanken infrastructure.
+  const locale3 = computed(() => (locale.value == "en" ? "eng" : "swe"));
+
   // Sync from storage once, if present
   if (storedLocale.value) {
     locale.value = storedLocale.value;
@@ -50,6 +53,7 @@ export default function useLocale() {
 
   return {
     locale,
+    locale3,
     th,
     filesize: myFilesize,
   };
diff --git a/src/i18n/locales/en.yaml b/src/i18n/locales/en.yaml
index c806e13..202bd55 100644
--- a/src/i18n/locales/en.yaml
+++ b/src/i18n/locales/en.yaml
@@ -270,7 +270,7 @@ api.code.failed_uploading_sources: Failed to upload source files
 api.code.failed_uploading_sources_file_size: Some files could not be uploaded, because they exceed the maximum file size of {max_file_size} MB
 api.code.failed_uploading_sources_invalid_file_extension: 'File "{file}" could not be uploaded, because it has an invalid filename extension. Please use any of the supported file formats: xml, txt, odt, docx, pdf.'
 api.code.failed_uploading_sources_invalid_xml: File "{file}" could not be uploaded, because it contains invalid XML
-api.code.failed_uploading_sources_incompatible_file_extension: File "{file}" could not be uploaded, because it has an different filename extension. Please check that the file format of this corpus is configured to agree with your source files.
+api.code.failed_uploading_sources_incompatible_file_extension: File "{file}" could not be uploaded, because it has a different filename extension. Please check that the file format of this corpus is configured to agree with your source files.
 api.code.uploaded_sources: The source files were successfully added
 api.code.data_too_large: Request data too large (max {max_content_length} MB per upload)
 api.code.listing_sources: Listing current source files for the corpus "{corpus_id}"
diff --git a/src/util.js b/src/util.js
index 10aa020..e4a70ef 100644
--- a/src/util.js
+++ b/src/util.js
@@ -67,3 +67,16 @@ export function setKeys(obj, keys, defaultValue = null) {
 
 /** Create a random string of around 11 chars in the [0-9a-z] range. */
 export const randomString = () => Math.random().toString(36).slice(2);
+
+/** Execute callback, catch and return any exception, otherwise return undefined. */
+export const getException = (f) => {
+  try {
+    f();
+  } catch (e) {
+    return e;
+  }
+  return undefined;
+};
+
+export const getFilenameExtension = (filename) =>
+  filename.split(".").slice(1).pop() || "";
diff --git a/src/util.test.js b/src/util.test.js
index 027a6bc..77af09b 100644
--- a/src/util.test.js
+++ b/src/util.test.js
@@ -3,6 +3,8 @@ import {
   ensureExtension,
   formatDate,
   formatSeconds,
+  getException,
+  getFilenameExtension,
   pathJoin,
   randomString,
   setKeys,
@@ -64,3 +66,37 @@ describe("randomString", () => {
     expect(fails).toEqual([]);
   });
 });
+
+describe("getException", () => {
+  test("translate success to undefined", () => {
+    const f = () => "foobar";
+    const exception = getException(f);
+    expect(exception).toBeUndefined();
+  });
+  test("reflect exception", () => {
+    const f = () => {
+      throw new EvalError("Leverpastej");
+    };
+    const exception = getException(f);
+    expect(exception.name).toBe("EvalError");
+    expect(exception.message).toBe("Leverpastej");
+  });
+});
+
+describe("getFilenameExtension", () => {
+  test("one extension", () => {
+    const filename = "palakpaneer.txt";
+    const extension = getFilenameExtension(filename);
+    expect(extension).toBe("txt");
+  });
+  test("no extension", () => {
+    const filename = "marinara";
+    const extension = getFilenameExtension(filename);
+    expect(extension).toBe("");
+  });
+  test("two extensions", () => {
+    const filename = "svt.xml.bz2";
+    const extension = getFilenameExtension(filename);
+    expect(extension).toBe("bz2");
+  });
+});
diff --git a/walrus b/walrus
new file mode 100644
index 0000000..e69de29