Added warning about internationalization

README.md

@@ -19,3 +19,6 @@ pipenv run lektor server -f webpack
 Once the build finishes, you can open [http://localhost:5000](http://localhost:5000) and press on the pencil icon to
 make changes. Once you're satisfied, open a branch, commit your changes **with a meaningful commit message** and open a
 pull request!
+
+**If you submit a copy change, please try to internationalize it, or open an issue with the commit or literal text
+added or changed, assigning @g5pw for `[si]` or @5p4k for `[en]`.**