As AngieMyst points out, there is culture and grammar that might make it look silly to a reader fluent in Japanese, but furthermore: Consider who benefit from it. If your readers do not speak Japanese, the actual content is lost for them, and it remains solely a fashion statement, akin to making right-to-left comics even though both you and your readers actually read left-to-right: At best it is pointless, at worst it is annoying the readers and making the comic less appealing and less easy to read. While the latin alphabet does not contain as explosive ciphers as the japanese, with a bit of training, you can make just as visually expressive sound effects with it, or with simple linework.
Oh okay, thank you. I'm making a comic for my original story but it's like Manga where you have to read right-to-left because I plan on translating it into a different language. That makes sense right?
Unless you are from a culture where right-to-left reading is the norm, I would strongly advise against it. I have seen quite a few comics made by Western people who believed that right-to-left is the "proper" way to read a manga. They almost always clash, because the artist is consciously trying to work right-to-left with the major elements while she unconsciously works right-to-left with the details. The rule of "keep it simple, stupid" (KISS) dictates that whenever you want to put something into your work that makes deciphering it harder, there must be a pay-off that is greater than the loss in clarity. That said, it is YOUR comic, so it is your decision.
Thanks for the tutorial, it helps But, about the template...If I understood well, the red area is the one which you should put text and important things, the blue is an extra and the green is a border...but what about the white area?
green: will definitely be cut off blue: this area might be cut off, since it's not always accurate. white & red: this is the entire area you draw on. Some people like drawing panels going all the way off the page or spreads without panels. (I keep it clean and tidy usually) red: this is the area important bits should be. if speech or faces are outside this, it will be hard to read or look off balance.