How are you designing courses for localization from the beginning?

I've been thinking a lot about localization as a design decision rather than something that happens after a course is built.

One thing I've learned from working on global learning projects is that decisions made early, including how text is handled in graphics, how media is structured, how reviews are managed, and how the course is packaged, can make a huge difference once you begin scaling across languages.

I'm curious how others approach this. What are you doing during the design and development stage to make localization easier later?