It really depends on the how high/low the vowels are spoken in a language. IE, it's easier for spanish speakers, and most non english Europeans language speakers to pronounce Japanese words.
I never played any of the SRW games, but isn't it one of the requirements for the mecha to be in these games to be spaceworthy? Almost all footage I saw from the various games are portraiting fights in space, and none of the CG mechs can go there. Heck, I wished all of them had stayed on the ground and stuck to Land Spinners instead of getting Float Systems, except for perhaps a handful of named characters.
Nope. Units from ZOIDS, Full Metal Panic, GunxSword, Goddanar, and King Gainer, etc are all non space unit and are in the series. They just have [parasitic bomb] space terrain stats. But those can be fixed with proper modules.
Also Taneguchi mentioned in an interview after being asked near the start of the franchise where Geass came from. He said that for the most part, the word was completely made up. But it did have a joke of beeing called geese due to the symbol being a bird flapping it's wings when he uses it towards a target. Also in relation to the word Gears, jokingly as he put it as the "gears that would cause the world to turn"