To add to that, it's my understanding that, in the wreath, the first twist is normally (always?) the metal (or or argent), and the next twist is the color.

To give the other answer to the question, the motto can be in any language, as far as I know. In English arms the motto is often in Latin, French, or English. In Scottish arms the motto may also be in Scots or Gaelic.

Also, while English is the base language of English (and Scottish) heraldry, and medieval French is the source of most of the specialized vocabulary, there are a few terms (e.g. dexter and sinister) that were borrowed directly from Latin.