General Language Notes
1) Insults. Mostly, these come in the form of impolite pronouns. Words like kisama and yarou arent technically dirty names, theyre just very impolite. Occasionally, as is the case with school children, these can become as creative as most American insults, ranging from impugning a persons intelligence to impugning their direct genetic makeup.
2) Plurals. The only way of expressing plural (aside from using numbers) is with a special noun ending. The suffix -tachi is the polite way of doing this; it expresses a group of things. For instance, Bob-san-tachi means Bob and whoever happens to be associated with him by context this could mean all the people sitting at the same table with Bob, all of Bobs closest friends, Bobs closest coworkers, or whatever. The suffix -ra is the impolite/informal way o