ONLY FOR ENGLISH WIKIPEDIA!!!
To create the link to Wikipedia in game you must:
1. Copy any civilization file from [game\civilizations].
2. Paste the file in [game\civilizations_informations]
3. Rename file. Name must be same as civilization tag:
For example tag for civ. [English] is [usa], so [civilization_information] file will be [usa].
4. Open the file with any text editor (notepad).
5. Then write or paste words, which follows after [https://en.wikipedia.org/wiki/].
For example United States in wikipedia is [https://en.wikipedia.org/wiki/United_States],
so the text in the file will be [United_States]
Check examples in [game\civilizations_informations].