I'm just a user of MC like you.
I spent a little of my free time to make these instructions for your case so hopefully you are willing to try it. I'm sure you can do it if you try and it only takes couple of minutes
1. Copy below code in to clipboard (e.g click Select and copy selected text with using right click and copy) This "code" will open wikipedia on same tab you clicked it. If you want to open wikipedia in a new tab or inside external browser then use one of the "codes" below instead of this one.
<Link version="1,2">
<Item Name="Name">Wikipedia (Album)</Item>
<Item Name="Action">0</Item>
<Item Name="Base URL">http://en.wikipedia.org</Item>
<Item Name="Search URL">If(!IsEmpty([Web Media URL]),[Web Media URL],http:////en.wikipedia.org//wiki//Special:Search?search=Hexify([Album])&go=Go)</Item>
<Item Name="Filter">[Media Type]=[Audio]</Item>
</Link>
2. in MC Select Tools ==> Links ==> Manage Links... from the top menu
3. Click "Add" button
4. Click "Paste Link Information From Clipboard" and then click "Ok" button
All ready. Now if you assign your wikipedia link to "Web Media URL" field for album's files you can click Wikipedia (Album) Link above right and MC at will open wikipedia page. If there is no link assigned in "Web Media URL" MC will try to search album from Wikipedia.
(Optionally, you could also create your own field (tag) instead of "Web Media URL" if you like. Then you need to use that field in the link configuration instead of "Web Media URL".)
if you want to open it inside MC but in new tab then use this code:
<Link version="1,2">
<Item Name="Name">Wikipedia (Album)</Item>
<Item Name="Action">2</Item>
<Item Name="Base URL">http://en.wikipedia.org</Item>
<Item Name="Search URL">If(!IsEmpty([Web Media URL]),[Web Media URL],http:////en.wikipedia.org//wiki//Special:Search?search=Hexify([Album])&go=Go)</Item>
<Item Name="Filter">[Media Type]=[Audio]</Item>
</Link>
This link "code" will open Wikipedia in external browser.
<Link version="1,2">
<Item Name="Name">Wikipedia (Album)</Item>
<Item Name="Action">1</Item>
<Item Name="Base URL">http://en.wikipedia.org</Item>
<Item Name="Search URL">If(!IsEmpty([Web Media URL]),[Web Media URL],http:////en.wikipedia.org//wiki//Special:Search?search=Hexify([Album])&go=Go)</Item>
<Item Name="Filter">[Media Type]=[Audio]</Item>
</Link>