In France, we are taught british-oxfordish-fish & chipish english. So I know by heart that the correct past tense of the verb learn is learnt. Now, like a group of poet said We're all living in Amerika and I am definitely more use to the murica's form. Thanks /r/til I guess.
I will start using "learned" over "learnt" on a daily basis. "-ed" is already mostly the past tense mark in british english. Let's consider the american version as a feature istead of bug.