I never had seen a French person frowning at the worst possible attempt at French.

Your French could sound like a seal having a stroke while tripping on acid, like a 1920 Ford T coughing on sugar reach diesel, like a dyslexic Albanian speaking Icelandic - and still the result will be at least an attempt at understanding and communication.

Compare that to Germany, where one mispronounced syllable in a conversation with a native aboriginal make the same effect as if you were telling them a double 4-disk Enigma encrypted message.