You can use normal nwn2 formatting markings. That includes things like <color=xxx> or <b></b> for bold and <i></i> for italics.
The tlk entry can also have links to other wiki pages. If there is multiple wiki pages linked in the same entry then their texts are concatenated together in the order the links are in the entry.
When it is fetching wiki pages it will automatically convert wiki formatting markings to the nwn2 markings. It uses following rules:
| Wiki | Nwn 2 | Notes |
|---|---|---|
| Bold | Bold | |
| Italics | Italics | |
| Tab | 4 spaces | |
| Line break | Line break | |
| Header: | Red bold header | In the beginnig of line |
| 1st column in tables | Magenta Bold header | |
| Other columns separators | : | |
| Headers | Gold bold header | All levels |
| Paragraphs | Empty line |