Added common language enum. Fixed "romaji" spelling. More UI updates.

MangaReader.Core/Sources/MangaNato/Metadata/MangaNatoWebCrawler.cs

@@ -1,4 +1,5 @@
 using HtmlAgilityPack;
+using MangaReader.Core.Common;
 using MangaReader.Core.Metadata;
 using System.Text;
 using System.Web;
@@ -46,7 +47,7 @@ public class MangaNatoWebCrawler : MangaWebCrawler
             SourceMangaTitle sourceMangaTitle = new()
             {
                 Title = title,
-                Language = SourceMangaLanguage.Unknown
+                Language = Language.Unknown
             };
 
             sourceMangaTitles.Add(sourceMangaTitle);