Speaking Of: Machine Translation and Natural Language Processing (NLP) https://www.aws.training/learningobject/curriculum?id=27153
Amazon Comprehend https://aws.amazon.com/comprehend/features/
Apache OpenNLP https://opennlp.apache.org/
Stanford NLP https://nlp.stanford.edu/software/
Pre-trained models https://opennlp.apache.org/models.html
UCI Machine Learning Repository: https://archive.ics.uci.edu/ml/datasets.html
Good review of what's out there for sentiment analysis: https://blog.cambridgespark.com/50-free-machine-learning-datasets-sentiment-analysis-b9388f79c124
Multi-Domain Sentiment Dataset - based on Amazon reviews http://www.cs.jhu.edu/~mdredze/datasets/sentiment/
http://technobium.com/sentiment-analysis-using-opennlp-document-categorizer/ https://milindjagre.co/2016/08/26/twitter-sentiment-analysis-using-opennlp-java-api/