I recently saw the word 'compatriate' used in a newspaper article. Upon looking it up, suspecting a typo (or even an eggcorn: it is easy to see how compatriot would be mixed-up with expatriate etc.), I was surprised to see Wiktionary vouch for the word with the sole explanation: "Alternative spelling of compatriot".
However, not only did my googling yield extremely few credible uses of this spelling, none of the dictionaries I have access to have ever heard of it: both dictionary.com and Merriam Webster do not return anything.
While I don't want to cast unfair aspersions on Wiktionary's reliability, I find it slightly suspicious that no other online sources mention this spelling... And if it is an acceptable spelling, I would love to know what is its relation to the main spelling and whether it is tied to particular regional or historical practices.