h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

such as:
'll' instead being an aspirated L, i.e. put your mouth in order as to say 'L' but blow instead. Sort of.
there is also the aspirated 'R', spelt 'rh', and the difference between 'th' and 'dd'; i.e. as in 'breath' and 'this'. (Which I think was the same as in Old English.) Non-aspirated 'r's are 'flapped' which is like rolling them, but only once.
'ch' is AFAIK not pronounced like 'church', more like 'loch'.
the 'ng' sound, which I have no idea how to describe (like 'ing', but without starting or finishing it properly.)
And even harder, 'ngh'.
'f' pronounced as 'v' with 'ff' supplying the 'f' sound.
the 3 types of initial consonant mutation, such as go after the definite article for feminine singular nouns (i.e 'y ddraig' etc.) and part of indicating possession.
'Y' is generally a schwa except in the last syllable of words, or monosyllables (except the words 'y' and 'yn', I believe) when it's either 'i' (in the South) or something else in the North which I am not sure about.
'W' is generally 'u' but 'gwy' is pronounced like you'd expect.

You could also substitute your phrases for the colloquial versions, you have them written as in the formal, literary language.
i.e: 'dw i'n' (I am) 'dw i'n hoffi' (I like).

The same root, 'waelisc' for 'foreigner' also went to name Wallonia and Wallachia.