* ffmpeg: a sentence should not begin with an object pronoun. * img2pdf: fixing a verb tense, and rephrasing to match the original in English. * java,javac: fix verb tenses. * mongo: translating a word that doesn't need to stay in English. * ssh*: translating a word(s) that do(es) not need to stay in English. * ffmpeg,ssh: updating command accordingly to the English version.