public static com.google.cloud.translate.v3.Glossary.LanguageCodesSet getDefaultInstance() {
      return DEFAULT_INSTANCE;
    }
<pre>
The ISO-639 language code(s) for terms defined in the glossary.
All entries are unique. The list contains at least two entries.
Expected to be an exact match for GlossaryTerm.language_code.
</pre>

<code>repeated string language_codes = 1;</code>

@param value The bytes of the languageCodes to add.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/Glossary.java