In 2013, I designed the UI and UX for the largest web project I’ve ever been a part of. The design governs around 1800 pages of content (in the primary language); it’s also global, multi-region and multi-language. I was also responsible for designing the UI/UX for a Magento e-commerce instance of similar scope.
I worked independently on the design and made a lot of UX decisions beyond my pay grade at the time with minimal feedback or checking-and-balancing taking place. In short, there was no one else. It was at once extremely stressful and awesome on account of the freedom.
Now, to discuss some of the challenges I faced:
1. Designing for the space hog
If there isn’t a way around building text into your interface (navigation, for instance) build in enough space, or adjust the font in a way that will allow for the space-hoggiest languages.