> Do you like it being in the Japanese writing system or would you prefer phoenetical English?

Definitely Japanese writing system. Thanks.

Amazing tool.

Fwiw, if you’re looking to monetize, you may want to try to get a contract with the DoD. I would start with special operations (lots of money and urgent mission/training needs), and then move on to the Defense Language Institute.

Oral proficiency interviews (OPIs) are part of the qualifying standard, and everyone wants more practice.