Assess basic text input in each target language on at least one common Android IME.
Without knowing the language in question, enter a small amount of text in a variety of contexts, to identify issues with viewport scrolling, selections, keyboard show/hide, and candidate text being lost / duplicated / prematurely committed.
Obviously, this does not replace the need for acceptance testing by editors who understand each individual language.
Steps to perform: https://www.mediawiki.org/wiki/VisualEditor_mobile_IME_analysis
Target wikis: https://www.mediawiki.org/wiki/Visual-based_mobile_editing/Mobile_editing_documentation#Target_wikis
Acceptance criterion: for each target wiki, the above steps have been performed, and each arising issue has been recorded and analysed.