Learn to Read Ingglish
Eight short lessons, taken in any order, nothing locked. They start with the thousands of English words Ingglish leaves completely unchanged, then take on silent letters, vowels that stay consistent, ph becoming f, c splitting into k and s, the common letter patterns, the split between th and dh, and finally whole sentences.
Each lesson explains its rule with five worked English-to-Ingglish pairs and then asks five questions where you type the English word behind an Ingglish spelling. Your best score per lesson is kept in the browser, so the menu shows what you have finished and how well. This is the gentlest way in; the spelling guide is the reference version of the same material.