Could not load hunspell dictionary locale – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch fails to load the Hunspell dictionary for a specific locale. This could be due to a missing or incorrectly configured dictionary file. To resolve this issue, ensure that the dictionary file for the specified locale is present in the Elasticsearch’s config/hunspell directory. If it’s not, download the appropriate dictionary file and place it in the directory. Also, check the file permissions to ensure Elasticsearch can read the file. Lastly, verify the dictionary file’s format and structure, as it should be in a format that Elasticsearch can understand.

This guide will help you check for common problems that cause the log ” Could not load hunspell dictionary [” + locale + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices, analysis.

Log Context

Log “Could not load hunspell dictionary [” + locale + “]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            try (Directory tmp = new NIOFSDirectory(env.tmpFile())) {
                return new Dictionary(tmp; "hunspell"; affixStream; dicStreams; ignoreCase);

        } catch (Exception e) {
            logger.error(() -> "Could not load hunspell dictionary [" + locale + "]"; e);
            throw e;
        } finally {