Them is a personal pronoun that you use when you refer back to people/creatures/items that you have already mentioned. So, in this context your first question would be: How many languages do you speak? And if you followed up, wanting to know more about these languages, you might ask: How many of them did you learn at school? Of them is another way of saying of these languages.
How many of vs How many - English Language Learners Stack Exchange
How many people attended the party? How much wine did we drink last night? How many bottles of wine did we drink last night? And so on. Mangoes, like most fruit, are countable. With countable nouns, you are correct and would say, "I don't need that many". With uncountable nouns, you would say, "I don't need that much."
The meaning of MANY is consisting of or amounting to a large but indefinite number. How to use many in a sentence.
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How many rounds are in the NBA Playoffs? Teams have to run the gauntlet if they want to win a title. The NBA Playoffs have changed quite a bit over the years. From the number of rounds in the ...
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The difference between " These many pictures" and " This many pictures" could be referring more to what the speaker wants the qualifying word to apply to - either the many or the pictures. So "I always take these many pictures " begins to sound like you always take those exact pictures (like the same pictures over and over) which happen to be "many". Whereas "I always take this many pictures ...