The colonial period, roughly between 1600 and 1900, saw an unprecedented movement of speakers of English to locations overseas. The reasons for this movement vary considerably, from deportation of prisoners and political opponents to voluntary emigration by groups with economic motives, sometimes mixed with religious ones. The rise of first-language overseas varieties depends heavily on the founder generation and the sociolinguistic scenarios they found themselves in. In addition, many countries have second-language varieties which in general have arisen through an English-oriented educational system and, previously, through contact in colonies with English speakers.

The English language has been attested in Ireland since the late twelfth century but did not become widespread until the beginning of the seventeenth century when vigorous planting of English settlers took place. Distinct forms of Irish English began to develop which were a mixture of diverse dialectal inputs from England and transfer phenomena from Irish as the native population began to switch to the language of the colonisers. Almost as the same time as planting of English settlers started there was a movement out of Ireland, either by deportation or voluntary emigration, largely due to economic circumstances. This led to areas in overseas anglophone regions showing centres of Irish emigration, e.g. Appalachia with eighteenth-century Ulster Scots or the north-eastern coast of the USA with nineteenth-century southern Irish Catholics. At these locations the linguistic impact of Irish English was slight but traces can be found still which testify to this input.

The rise of standard forms of language for both the English- and the Spanish-speaking worlds is a development which benefits from contrast. Both languages spread overseas, with national standards arising during the later colonial period through a process of supraregionalization by which local varieties lost strong vernacular features and came to function as non-stigmatized, publically accepted varieties. However, the details of these developments are different and the cultural attitudes to varieties spoken in the source countries in Europe vary considerably, determining the ways in which standards are viewed and used in both the Anglophone and the Hispanophone worlds.