Therefore in Novial, as well as in Esp-Ido, we simplify the spelling in all words containing double letters in the national languages, from which the words are taken: pasa (E pass, F passer), efekte, komun (F commun, E common), etc. In this we follow the beautiful example of Spanish, which writes pasar, efecto, común, etc., and even extend it to cases in which Spanish makes a distinction in sound and spelling, as with ll and rr: bel S bello, F belle, koresponda, S corresponder, etc.
1928, Otto Jespersen, An International Language, page 48