VULCAN, "The one that annoys me is leaving off the G at the end of a word. Goin, readin, walkin, etc, is just sloppy, nothing to do with dialect or anything else."
That's a bit of a sweeping statement and it's false, at least as far as Scots dialects are concerned
https://scotslanguage.info/scots-learners-grammar-verbs/
3.2 Present participle
The present participle is formed by adding -in to the root e.g. stert, stertin.
If the root ends with a consonant after a single vowel, double the consonant e.g. ken, kennin; mak, makkin.
Verbs ending in -e drop the last vowel e.g. come, comin; ettle (try), ettlin, and verbs ending in -ie change the spelling e.g. cairrie, cairryin.
The only real irregular is the verb gae (go). Although gaein is used, the form gaun is just as popular.
A’m gaun hame.
The spoken contraction gaunae, often replaces gaun tae before a verb.
A’m gaunae mak the tea
(but A’m gaun tae the gemm if not followed by a verb).
The present participle is used more in Scots than in English. Again this could be a Gaelic influence.
A’m no needin ocht the noo (I don’t need anything just now)
She stairtit greetin (She started to cry)
A’m no wantin (I don’t want to)
A’m thinkin he’s no in.
As in English, the present participle is used to form nouns such as biggin (buiding) and flittin (house moving)."