A 12-part course on grammar, clarity, and professional writing.https://penluma.com/https://penluma.com/blog/english/00-index/https://penluma.com/blog/english/00-index/A practical English writing course built around the exact grammar mistakes developers make in commits, PRs, and Slack. Fix typos, run-ons, and more.Wed, 17 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/01-articles-a-an-the/https://penluma.com/blog/english/01-articles-a-an-the/Learn exactly when to use a, an, the, or no article in English. Fix dropped articles in your PRs, commits, and Slack so your writing sounds natural and clear.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/02-countable-uncountable-much-many/https://penluma.com/blog/english/02-countable-uncountable-much-many/Learn when to use much vs many, few vs less, and when to add an "s" - the one countable vs uncountable rule that quietly fixes your commits, PRs, and standups.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/03-subject-verb-agreement/https://penluma.com/blog/english/03-subject-verb-agreement/Learn subject-verb agreement the practical way. Stop writing 'the tests passes' or 'the users is' so your PRs, standups, and commits read clean and credible.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/04-verb-tenses/https://penluma.com/blog/english/04-verb-tenses/Learn which verb tense to use in commits, standups, and PRs - and stop your sentences drifting between past and present. A clear guide for developers.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/05-plurals-and-possessives/https://penluma.com/blog/english/05-plurals-and-possessives/Stop writing API's for plurals and mixing up its vs it's. A clear, dev-friendly guide to plurals, apostrophes, and possessives in commits, PRs, and Slack.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/06-prepositions/https://penluma.com/blog/english/06-prepositions/Stop guessing between "depend on" and "depend to." A clear preposition cheat sheet for developers covering in, on, at, to, and for in real code talk.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/07-punctuation-and-capitalization/https://penluma.com/blog/english/07-punctuation-and-capitalization/Lowercase i, missing full stops, and run-on sentences make your writing look rushed. Learn the punctuation and capitalization rules that read as senior.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/08-sentence-structure-run-ons/https://penluma.com/blog/english/08-sentence-structure-run-ons/Fix run-on sentences, comma splices, and fragments so your commits, PRs, and Slack messages read clearly the first time. Four simple fixes, real examples.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/09-commonly-confused-words/https://penluma.com/blog/english/09-commonly-confused-words/Its vs it's, login vs log in, then vs than - the small word mix-ups that make a clean PR look careless, and the quick tricks to never get them wrong again.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/10-professional-dev-writing/https://penluma.com/blog/english/10-professional-dev-writing/Learn to write professional commit messages, pull requests, and code review comments. Small writing fixes that make your engineering work read as senior.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/11-spelling-typos/https://penluma.com/blog/english/11-spelling-typos/Stop the typos that sneak into commits, PRs, and Slack. Learn the spelling mistakes developers get wrong most and simple tricks to fix them fast.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developershttps://penluma.com/blog/english/12-master-mixed-review/https://penluma.com/blog/english/12-master-mixed-review/A practical grammar workout for developers: fix real commit messages, PRs, and Slack standups with drills on articles, much vs many, tenses, and run-ons.Mon, 15 Jun 2026 00:00:00 GMTEnglish for Developers