Recently some translations have started appearing that change the case or the grammar. For example if the english is:
then the translation should preserve both the capitals and the grammar, e.g:
It may look wrong in the UI if you change the case and lose the grammar, e.g.:
Please make sure the translations you contribute are preserving case and grammar.
I've added this to the "Common mistakes to avoid" section in this thread. Lots of people still make the mistakes listed there. I often clean up the minor ones but it saves time if you can try to stick to them!