You can use tag search (just add the # symbol before the word) in any language, for example, in Malaysian
An example of a POST request:
https://api.data365.co/v1.1/twitter/search/post/update?keywords=%23negara&search_type=latest&max_posts=100&access_token=TOKEN
A GET request example to search data by a hashtag:
https://api.data365.co/v1.1/twitter/search/post/posts?keywords=%23negara&access_token=TOKEN