The advice to keep the app's screen labels as they are unless the app itself is localised is the one most teams get wrong. A German voiceover pointing at a button that says "Export" is fine, but a demo with translated captions over English UI can confuse people when they open the real product and the words don't match. The timing point is real too. German and Spanish often run longer than English, so a scene cut that fits the English voice can end mid-sentence in another language.