Looking at strings in the linked apptranslator.org website, a lot of them have ampersands (&) e.g. "&Back" or "&Book View"
What do those mean?
Translations seem to put them in the middle sometimes
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on the other hand, there are languages even with "0 untranslated strings" that have untranslated "unused strings" - what are those about, and is it okay to not have those be tracked?