Social activities are an important part of the context of language use and provide many keys to understanding linguistic and communicative features. Such features can be well understood only if they are observed in their natural setting which to some extent is possible using a multimodal corpus as linguistic communication itself is multimodal. In order to study naturalistic multimodal communication using a corpus, the corpus should contain a combination of recordings, documentation, and transcription of multimodal communication from different social activities in naturalistic settings, preserving unedited conversation. This paper presents a brief account of the principles, methodology, current status, and further issues, based on an incrementally growing and multimodal activity based spoken language corpus of Lohorung.