This paper describes materials and annotation facilitation pertinent to the «Erzya-Moksha Electronic Resources and Linguistic Diversity» (EMERALD) project. It addresses work following the construction of finite-state analyzers for the Mordvin languages, the gathering of test corpora, and the development of metadata strategies for descriptive research. In this paper, we provide three descriptors for a set of new Erzya and Moksha research materials at the Language Bank of Finland. The descriptors illustrate (1) a low-annotation subcorpora set of the «Electronic Resources for Moksha and Erzya» (ERME); (2) the state of the open-source analyzers used in their automatic annotation, and (3) the development of metadata documentation for the «EMERALD» project, associated with this endeavor. Outcomes of the article include an introduction to new research materials, an illustration of the state of the Mordvin annotation pipeline, and perspectives for the further enhancement of the annotation pipeline.