Free/Open-Source Machine Translation: a three-day tutorial ... - CNGL

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(a) Description • Background (interNOSTRUM, Universia) • Rationale • Apertium as a shallow-transfer machine translation platform: engine, data, tools (Armentano et al. 2006). • Language-pair data • Funding • The Apertium community as an example of FOSS development (repositories: the trunk, the incubator; roles). • Apertium tools: apertium-dixtools, apertium-transfertools, apertium-tagger-training-tools. • Apertium-based applications (Tinylex, Wordpress plugin, Pidgin plugin, OpenOffice.org plugins, etc.) • Apertium as a research platform (Sánchez-Martínez and Forcada 2007, Sánchez-Martínez et al. 2008). (b) Laboratory: installing and modifying Apertium • Installing Apertium from the latest sources on a virtual Linux machine. • Changing the data for a language pair: vocabularies and, optionally, transfer rules. 4. Corpus-based FOSMT: Moses (*) (a) Statistical machine translation • Statistical MT (SMT) • The data: sentence-aligned corpora. • Training: the statistical models • The SMT engine or “decoder” (b) Description of Moses and related software: • Training: Giza++ • Language models: irstlm • Tuning: MERT • Decoding: Moses (c) Laboratory: installing and running Moses. 4
QUESTIONS: 5. Additional material (*) • Installing Moses and all of the auxiliary software (Giza++, language model, etc.). • Training a toy SMT system with Moses. (a) Evaluation of machine translation • FOSS for evaluation: IQMT, etc. • Human evaluation: postediting and the traditional adequacy/fluency/informativeness • Automatic evaluation: BLEU, etc. Criticism of automatic evaluation. (b) Free/open-source resources that can be used to build FOSMT systems (c) Related software • Morphological analysers, taggers: Freeling • Data useful for morphological analysers: Wiktionary (start of Breton, Icelandic and Faroese) • Free bilingual dictionaries: DACCO, etc. • Parallel corpora: Europarl, OPUS, etc. • ReTraTos: perl tools to build bilingual dictionaries from aligned corpora • Free text: Wikipedia (easy access to free “raw” text) • Bitext tools: bitextor, tagaligner, etc. Non-MT FOSS for translation: OmegaT (translation memories), etc. Blocks marked with (*) will be dealt with if time allows. 4.1 References • Armentano-Oller, C., Carrasco, R.C., Corbí-Bellot, A.M., Forcada, M.L., Ginestí-Rosell, M., Ortiz-Rojas, S., Pérez-Ortiz, J.A., Ramírez- Sánchez, F., Sánchez-Martínez, F., Scalco, M. (2006) “Open-source 5
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Free/Open-Source Machine Translation: a three-day tutorial ... - CNGL

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