He did research on consumer attitudes, innovation and language in cross-cultural contexts (comparing Asian and western languages).

There are other branches of linguistics that involve comparing languages, which are not, however, part of comparative linguistics:

Contrastive linguistics compares languages usually with the aim of assisting language learning by identifying important differences between the learner's native and target languages.

Inspired by the natural sciences, especially biology, Schleicher was the first to compare languages to evolving species.

Comparative linguistics - branch of historical linguistics that is concerned with comparing languages to establish their historical relatedness.

Originally, attempts to describe learner language were based on comparing different languages and on analyzing learners' errors.

This would make it possible to compare numerous languages reliably.

If one compares languages of different branches, for instance the Southern Utes with the Shoshone, problems of understanding increase dramatically.

"You go at different speeds," she said, comparing languages to trains.

The concept of paraphyly has also been applied to historical linguistics, where the methods of cladistics have found some utility in comparing languages.