Vowels: Variation - when ‘i’ follows a ‘p’, ‘m’ or ‘w’ and is followed by ‘r’, ‘rm’ or ‘rt’ (but not ‘rr’) it becomes rounded like the French ‘tu’, 'e' followed by ‘m’, ‘n’, ‘ng’, ‘ny’ in the same syllable, is long and slightly nasalised.
Consonant combination - 'ny' (palato-nasal) combine 'n' and 'y' while top of tongue touches hard palate plus nasal vibration.
(Avoid the English 'ny' as in 'many').