カツ丼。豚カツ。カツカレー。カツ。
Katsudon. Tonkatsu. Cutlet curry. Cutlet.
The library doesn't seem too complex (except for the many unknown imports), I might try to port it to JS at some point
I never quite understood the reasoning either: https://news.ycombinator.com/item?id=23800805
Uncommon/novel/excessive romanizations like "katsukaree" or "hakkar nywusu" can be technically correct or more precise, but if they can't be traced to the word or concept at less effort for an average audience than "cutlet curry" or "hacker news", they actually serve the purpose less.
For real world uses, Google Search[1] in Japanese for "cutlet curry" gives me an info panel for cutlet, a dictionary page as top result, as well as multiple Japanese videos about cutlet curry(why would anyone take and upload that kinds of videos is a mystery to me). In contrast, for "katsukaree", it gives me "maybe you meant..." mini panel, and the top three results are an Instagram tag page, English Wikimedia Commons link, and Tripadvisor page for a restaurant in Columbia. I checked the tag results page but none of top or newest posts seemed to be someone from the country. I think it's safe to say "katsukaree" is quite an unpopular expression to native Japanese speakers.