3. The device claimed in claim 2 which further includes: a vocabulary storage memory comprised of; a first memory for storing words in both a base language and a target language, such words being grouped within such memory according to their morphological functions and accessible by means of spelling them out letter by letter on the alphanumeric keys; a second memory for storing those baselanguage words and corresponding target-language translations thereof which can be entered in a single keystroke by means of said dedicated keys; means responsive to the actuation of said keys for addressing both the first and second memories, and for fetching the selected words therefrom and retaining the addresses of said selected words.
3. The device claimed in claim 2 which further includes: a vocabulary storage memory comprised of; a first memory for storing words in both a base language and a target language, such words being grouped within such memory according to their morphological functions and accessible by means of spelling them out letter by letter on the alphanumeric keys; a second memory for storing those baselanguage words and corresponding target-language translations thereof which can be entered in a single keystroke by means of said dedicated keys; means responsive to the actuation of said keys for addressing both the first and second memories, and for fetching the selected words therefrom and retaining the addresses of said selected words. 4. The device claimed in claim 3 wherein said sentence pattern storage memory comprises: a subject phrase storage area; a predicate phrase storage area; and an object phrase storage area.