If you want a multilingual emoji dictionary, EMOJIALL is a good option. It covers 47 languages and offers a lot of features, including a dictionary with definitions, examples and usage notes, the ability to copy emojis, and an AI-powered sentiment analysis tool. It also has an emoji leaderboard and an "Emoji Maker" tool to create your own emojis, which can be useful for learning about and using emojis in other cultures.
Another contender is EmojiTell, which is geared more toward turning text into creative emoji mashups. It offers a big library of emojis with explanations for each, which can help you learn and use them properly. The service is designed to spice up digital communication by letting you convey more nuanced emotions and add context to messages, so it's good for social media, messaging and other uses.
If you want personalized and customizable avatars, Mirror offers an AI-powered service that turns selfies into cartoon emojis and stickers. It works with multiple languages and emotions, and can generate thousands of stickers you can use in various messaging apps. It's a good way to add some fun and expressiveness to your communications.