diff --git a/src/composables/types.js b/src/composables/types.js
deleted file mode 100644
index 54e0d5023f..0000000000
--- a/src/composables/types.js
+++ /dev/null
@@ -1,16 +0,0 @@
-/**
- * @template T
- * @typedef {import('@nuxtjs/composition-api').Ref<T>} Ref
- */
-
-/**
- * @template T
- * @typedef {import('@nuxtjs/composition-api').ToRefs<T>} ToRefs
- */
-
-/**
- * @template T
- * @typedef {import('@nuxtjs/composition-api').Ref<T> | T} MaybeRef
- */
-
-export default {}
diff --git a/src/composables/use-i18n-utilities.js b/src/composables/use-i18n-utilities.ts
similarity index 89%
rename from src/composables/use-i18n-utilities.js
rename to src/composables/use-i18n-utilities.ts
index 1364ffa4ed..6bf01203f3 100644
--- a/src/composables/use-i18n-utilities.js
+++ b/src/composables/use-i18n-utilities.ts
@@ -18,11 +18,7 @@ export function useI18nResultsCount() {
   const i18n = useI18n()
   const getLocaleFormattedNumber = useGetLocaleFormattedNumber()
 
-  /**
-   * @param {number} resultsCount
-   * @returns {string}
-   */
-  const getI18nCount = (resultsCount) => {
+  const getI18nCount = (resultsCount: number) => {
     const countKey =
       resultsCount === 0
         ? 'noResult'
diff --git a/tsconfig.json b/tsconfig.json
index 801d262f5d..c72461ae35 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -88,10 +88,15 @@
     "src/components/VModal/VInputModal.vue",
     "src/pages/feedback.vue",
     "src/pages/search-help.vue",
-    "src/composables/types.js",
 
-    // This section cannot be converted to TypeScript because it's used in non-TS contexts (like Tailwind configuration)
-    "src/constants/screens.js",
+    /**
+     * Some files from this section cannot be converted to TypeScript because they are
+     * used in non-TS contexts (like Tailwind configuration). Therefore they're left as
+     * "vanilla JavaScript" with JSDoc based type annotations. This allows us to check
+     * them with TypeScript without introducing syntax changes that are not compatible
+     * with other tools we rely on.
+     */
+    "src/constants/**/*",
     "src/server-middleware/healthcheck.js"
   ],
   "exclude": ["node_modules"],