What is the difference between standard and language analyzer in Elasticsearch?

Question

How much will the search improve? For example, if compare standard with Spanish (or any other).

Answer 1

Language analyzers are tuned for specific languages while the standard analyzer is language-agnostic but is said to "work pretty well for most languages".

You should go through the following documentation page https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-lang-analyzer.html which explains the language analyzers in more details.

The standard analyzer just uses:

• a standard tokenizer
• a lowercase token filter

The spanish analyzer does what the standard one does, and adds three more token filters:

• spanish_stop
• spanish_keywords
• spanish_stemmer

So if you know you have spanish text to analyze and you will need to create relevant free-text searches for your users, then I'd go with the spanish analyzer