No problem its strange that they have not translated it already seeing as the only thing new they would have to do would be the H content everything else is already in english.
Correct this version of the game does not have english support its the same as the base game but with extra routes. The is the link to base game which does have english support https://igg-games.com/maitetsu-free-193526646-download.html
Only english for Switch and PS4 : Pure Station has extra content from the base game so they are different.
The is the link to base game which does have english support
https://igg-games.com/maitetsu-free-193526646-download.html