Presentation!
Presentation of every app, the format, the outlook, layout, color scheme, themes is all very significant to the success of the app. Focus on your target audience and see what kind of colors, theme, and mentality is prevalent in the culture. You will also make sure that the design is compatible with the local culture that the target generation enjoys.
Make sure that your content sits well in the design after translation and does not go haywire. A lot of translated content looks like it does not belong in the app. No point in wasting money on localization if you are not obsessed with the final outlook and the result distastes the audience.
The more you tell your translator, the better!
Tell your translator what you want to see and hear. Tell them about your target audience, your app, and all the content that you are getting translated. Make as detailed a discussion as you possibly can prepare for the email or the meeting with clear points that you have outlined. If you and your translator are on the same page, they will put in their own ideas to tell you how and what you should put in your app to get the audience attention and retain it.