diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index abf87637..d3ac2976 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -27,11 +27,11 @@ There are two situations in which we create manual PRs to update translations:
     * Add entry in `rtlLocales`
 
 * [ ] Check if the new language uses a country code
-  * Check [https://www.transifex.com/explore/languages](https://www.transifex.com/explore/languages); compare to the ISO code on the language's Wikipedia page. If they are different:
+  * Check [https://www.transifex.com/explore/languages](https://www.transifex.com/explore/languages). If the language has a country code:
   * [ ] Edit `src/supported-locales.js`:
-    * Add new entry to `localeMap`. Format is `'<browser locale string>': '<Transifex locale string/ISO standard>'`
+    * Add new entry to `localeMap`. Format is `'<W3C HTML browser locale string>': '<Transifex ICU locale string>'`
   * [ ] Edit `.tx/config`:
-    * Add to the `lang_map` list. Format is `<Transifex locale string/ISO standard>:<browser locale string>`
+    * Add to the `lang_map` list. Format is `<Transifex ICU locale string>:<W3C HTML browser locale string>`
     * NOTE: we are moving away from using the `tx` cli; `.tx/config` will eventually be deprecated
 
 * [ ] Edit `src/index.js`: