Palindrome words in a sentence

Write a function findPalindromeWords(sentence) that finds all palindrome words in a sentence and returns an object { words, count }.

• A word is a run of Latin letters a-z and A-Z. Every other character (spaces, punctuation, digits, letters with accents such as é) separates words: 'Wow!' is the word wow, and '101' is not a word.
• The check is case insensitive: 'Mom' is a palindrome.
• words is an array of the palindrome words in lower case, in the order they appear in the sentence. A word that appears twice is in the array twice.
• A word of one letter is a palindrome.
• count is the number of items in words.
• No palindrome words (or an empty sentence): return { words: [], count: 0 }.

A regular expression such as /[a-z]+/gi finds the words.