Social networks, such as Twitter with its around 192 million active users per day, are increasingly changing the way how people access information, communicate with each other, express opinions and discuss a wide range of topics. An example of a rather controversial topic is feminism. This study sheds light on the used language and emojis when discussing feminism on Twitter. Emojis are graphic symbols, representing inter alia facial expressions, but also objects, food or drinks, animals, or emotions, and feelings. For the analysis, 195,843 evaluable tweets were collected between the end of February until the beginning of March 2021, covering the International Women's Day and part of Women's History Month. A quantitative approach is employed to evaluate the sentiment value of tweets on a lexical level. Sentiment analysis enables the investigation of public emotions about events, opinions, persons etc. Together with the sentiment value of the emojis, it provides the basis to analyze the identified words and topics of the discussions on Twitter. Additionally, as Twitter does not provide the gender of a user, the gender is tried to be derived from unstructured data such as the screen or username as well as the description. Results indicate that female users send in average tweets with a more positive tone than male users, while negative tweets are not significantly different between genders. Emojis are only used in a part of all tweets. The emojis used are correlated to the sentiment value of the tweet.