Scottish Gaelic spellchecker (GOC) by Akerbeltz

This will add a Scots Gaelic spellchecking addon. It will spellcheck just over 2.5 million words, making it by far the biggest Gaelic spellchecker to date.
Please note the following:

► This is a GOC-only spellchecker. This means that for the traditional spellings mór, dorus and dàinig it will suggest mòr, doras and tàinig.

Once you've installed it, go to:

► Innealan/Tools
► Roghainnean/Options
► Roghainnean adhartach/Advanced Options
► Put a tick against Ceartachadh-litreachaidh beò/Check Spelling As You Type

This will then underline words you type that the spellchecker thinks are wrong. Right click to see the suggestion