Correct spelling for the English word "super fluentest" is [sˈuːpə flwˈɛnte͡ɪst], [sˈuːpə flwˈɛnteɪst], [s_ˈuː_p_ə f_l_w_ˈɛ_n_t_eɪ_s_t] (IPA phonetic alphabet).
The word "super fluentest" is not recognized as a standard English word, and therefore, it does not have a specific etymology. It seems to be a combination of the prefix "super-" meaning "above" or "beyond", the root word "fluent", meaning "able to express oneself easily and articulately", and the superlative suffix "-est", used to indicate the highest degree of a quality. However, it is important to note that "super fluentest" is not commonly used in the English language.