Exclude "search" and "forms" terms from non-English dictionaries

This allows a user to install the English version and another version
without cluttering their setup with duplicated information.

If a user doesn't want to use the English version, they can get the
"search" and "forms" terms by installing the separate jmdict_forms
file.

jmdict.go

@@ -134,8 +134,12 @@ func extractTerms(headword headword, entry jmdict.JmdictEntry, meta jmdictMetada
 		return nil, false
 	}
 	if headword.IsSearchOnly {
-		searchTerm := createSearchTerm(headword, entry, meta)
-		return []dbTerm{searchTerm}, true
+		if meta.language == "eng" {
+			searchTerm := createSearchTerm(headword, entry, meta)
+			return []dbTerm{searchTerm}, true
+		} else {
+			return nil, false
+		}
 	}
 	terms := []dbTerm{}
 	senseNumber := 1
@@ -156,7 +160,7 @@ func extractTerms(headword headword, entry jmdict.JmdictEntry, meta jmdictMetada
 		terms = append(terms, senseTerm)
 	}
 
-	if meta.hasMultipleForms[entry.Sequence] {
+	if meta.hasMultipleForms[entry.Sequence] && meta.language == "eng" {
 		formsTerm := createFormsTerm(headword, entry, meta)
 		terms = append(terms, formsTerm)
 	}

jmdictForms.go

@@ -210,17 +210,21 @@ func formsExportDb(inputPath, outputPath, languageName, title string, stride int
 		return err
 	}
 
+	meta := newJmdictMetadata(dictionary, languageName)
+
 	terms := dbTermList{}
 	for _, entry := range dictionary.Entries {
 		baseTerm := baseFormsTerm(entry)
 		headwords := extractHeadwords(entry)
 		for _, h := range headwords {
-			term := baseTerm
+			var term dbTerm
 			if h.IsSearchOnly {
-				term.Sequence = -term.Sequence
+				term = createSearchTerm(h, entry, meta)
+			} else {
+				term = baseTerm
+				term.Expression = h.Expression
+				term.Reading = h.Reading
 			}
-			term.Expression = h.Expression
-			term.Reading = h.Reading
 			terms = append(terms, term)
 		}
 	}