PronouncableWord.py

from random import shuffle

consonants = [
    # single consonants. without 'q' since it's often awkward in words
        "b", "c", "d", "f", "g", "h", "j", "k", "l", "m",
        "n", "p", "r", "s", "t", "v", "w", "x", "z",

    # possible combinations excluding those which cannot start a word
        "pt", "gl", "gr", "ch", "ph", "ps", "sh", "st", "th", "wh",
]

consonantsuf = [
    # these consonants are to be avoided in the beginning of words
        "ck", "cm", "dr", "ds", "ft", "gh", "gn", "kr", "ks", "ls",
        "lt", "lr", "mp", "mt", "ms", "ng", "ns", "rd", "rg", "rs",
        "rt", "ss", "ts", "tch",
]

vowels = [
        "a", "e", "i", "o", "u", "y", # singular vowels
        "ee", "oa", "oo", # vowel combinations your language allows
]

current_sound = 'consonant'

def r_shuffle(collection):
    shuffle(collection)
    return collection

def generate(length):
    current_sound = r_shuffle(['consonant', 'vowel'])[0]
    current_word = ''

    while len(current_word) < length:
        rnd = ''
        
        # random sign from either consonant or vowel list
        if current_sound == 'consonant':
            rnd = r_shuffle((consonants + consonantsuf))[0] if len(current_word) > 1 else r_shuffle(consonants)[0]
        elif current_sound == 'vowel':
            rnd = r_shuffle(vowels)[0]
        
        # check if the random sign fits in the word length
        if (len(current_word) + len(rnd)) <= length:
            current_word += rnd

            # alternate the sounds
            current_sound = 'consonant' if current_sound == 'vowel' else 'vowel'

    return current_word

for i in range(20):
    word = generate(6)
    print(word)