The arcade version of this game can be a little tricky. The language displayed depends on the Neo-Geo BIOS. A Japanese BIOS will display Japanese text, a US BIOS will display English text, and a European BIOS will display Spanish text. MAME will use the European BIOS by default.
Here are the MAME commands for choosing the appropriate BIOS:
mame -bios japan neobombe mame -bios us neobombe