To answer your first question is because you can't have good hentai if at least 95% of the female characters don't have hyperelastic skin and Axenfeld-Rieger syndrome. Though extremely rare in real life, in hentai it is absolutely essential for 99% of the female characters to have overly large eyes in order to land the cum shots better.
As for the 2nd question, I can't be bothered playing Engrish games where even a respected anime like Berserk gets the following Engrish song:
Feel no shame about shape
Weather changes their phrase
Even mother will show you another way
So put your glasses on
Nothing will be wrong
There's no blame, there's no fame
It's up to you
The first words should be finded
Whatever hold you back
I can, I can get it off
* Tell me what, Tell me what, Tell me what you want
I don't know why, don't know why, don't know why you afraid
Tell me what, Tell me what, Tell me what you say
I don't know why, don't know why, Too late, it's too late
Have no fear for real
It's just a turning wheel
Once you start up there's no other way
Don't put your eyes on boots
Step forward your roots
There's no aid there's no trade
It belongs to you