Each list entry must have the format: "[target] [search] [search] .." (for example "a 𝒜 @ à") whereas each "search" (𝒜, @ and à) will be replaced by "target" (a) before Highlight matching takes place. This is intended to normalize lookalikes to a single character for easier matching. The original "search" characters can not be matched on. In other places, for example for display in chat, the original message will be used.

• Each "search" is separated by on or several spaces.
• A "search" can be a single Unicode character (char) or several characters (word). Replacement takes place in two steps, first chars are replaced, then words are replaced.
• Any "search" words that are shorter than the "target" are invalid and will be ignored (if the "target" is a single ASCII character that can never occur).
• Replacing is case-insensitive, so when à is specified then both à and À will be replaced.
• Adding a single "#" in place of a "search" will cause all following eligible single characters to automatically be added with various diacritic marks. Example: "a # a" will search for the characters a, à, á, â, ã (and so on) and replace them with a. Adding another "#" will toggle the feature off again for following characters.