Language falls within immanence or transcendence. It should then prompt philosophers. Considering approaches to the immanent theory of language, the "point of view" is immanent to dispose of any "extra-linguistic reality," following the exclusion of the two "realities" generally taken into account by the "transcendent" approaches. Among many others, Spinoza, in a particularly marked form, gives the example of a reflection on language as far as possible from any immanent perspective. The reverse is true for Hjelmslev: it is probably impossible to implement a more immanent-design language. Compared to these two opposing views, the position of Saussure will be appreciated at its true value. Finally, there is the permanence in the language: language in its permanent essence.