Greasy Fork is available in English.
Lets you change the text colors as you wish and highlight chosen words
< Feedback on c.ai X Text Color
try to click the "reset" button on every color once and confirm it and then try again. It sometimes needs to register the colors first which the reset buttons will do.
How do your bring up the color wheel so you can actually change the default colors? I clicked on the paintbrush icon and it brought me to the table with the default colors. But it won't let me change the default colors.