> Windows and Mac dominate the world's computer systems, and the development tools for those environments are English-centric. The translations are lacking or no existent. The struggle of a Japanese developer to make an app is greater than that of a primarily English-speaking developer.
The lack of translations is true for almost every country and culture apart from the natively English-speaking ones. Some western languages such as German or French might get more in terms of translated (or natively written) documentation and teaching materials but many smaller ones have next to none. I've also seen software development materials with translations to Japanese or Chinese and nothing else (beside English).
I can't remember the last time I read any software development material or used software development tools in my native language.
There may still be some cultural differences that could lead to there being more or less of a language barrier, of course. Other languages may be closer to English, at least in terms of the writing system. In some cultures people might be less inclined to learn English as a second language well enough to be comfortable than in other cultures. Japan, having a large economy with a large domestic market as well as a strong language identity and a relatively homogeneous culture, might be one of those. (I seem to remember that, anecdotally, some highly educated Japanese people I met in the past were surprisingly uncomfortable speaking English, but I'm not sure how much of that was due to actual skill and how much it was about confidence or a lack of experience.)
But the anglocentrism of development tools and culture alone isn't enough to explain a difference between Japan and many other countries.
The lack of translations is true for almost every country and culture apart from the natively English-speaking ones. Some western languages such as German or French might get more in terms of translated (or natively written) documentation and teaching materials but many smaller ones have next to none. I've also seen software development materials with translations to Japanese or Chinese and nothing else (beside English).
I can't remember the last time I read any software development material or used software development tools in my native language.
There may still be some cultural differences that could lead to there being more or less of a language barrier, of course. Other languages may be closer to English, at least in terms of the writing system. In some cultures people might be less inclined to learn English as a second language well enough to be comfortable than in other cultures. Japan, having a large economy with a large domestic market as well as a strong language identity and a relatively homogeneous culture, might be one of those. (I seem to remember that, anecdotally, some highly educated Japanese people I met in the past were surprisingly uncomfortable speaking English, but I'm not sure how much of that was due to actual skill and how much it was about confidence or a lack of experience.)
But the anglocentrism of development tools and culture alone isn't enough to explain a difference between Japan and many other countries.