The objective of this paper is to present comprehensive principles of language spread that are applicable in post-globalized scenarios, by expanding upon and consolidating our already-published works in which had we studied different aspects of diachronic and synchronic linguistics and language dynamics including language dynamics in India. Admittedly, these principles and theories cannot be comprehensive, inclusive or wide-ranging enough to account for all dimensions of language spread in all possible scenarios at this juncture. However, we recommend a repository-type and a nomothetic approach which will allow for principles drawn from new and varied case studies and fieldwork from different contexts around the world to be generalized and extended to other contexts, with suitable annotations and clarifications regarding their anticipated general or context-specific use. These approaches are particularly relevant in post-globalized scenarios which we expect to be the norm, barring exceptions, given that the factors working in favour of a...