The names confuse me also, here we have a different name for each growth stage, male, female and younguns. Wildschwein or Schwartzwild is the generic name. Keiler is an adult male Boar. Bache is the adult female, sometimes Sau. Uberläufer is newly sexually mature, either sex, or from around six months to a year and a half. Frischlinge is before sexual maturity.
Either English needs some more words for Wild Pigs or I've yet to learn them.
I use just Boar as the generic term often and am probably wrong in doing so. If I try the translation app from German to English I get nothing for Wildschwein or Schwartzwild. Maybe I should just stick with Boar, Sow and Wild Hogs? Maybe Wild Boar as the generic term and Boar as the male term?