9. A computer system for translating a natural-language text document, the computer system comprising: a CPU, a computer-readable storage device, and a computer-readable memory; first program instructions to receive the natural-language text document for translation; second program instructions to divide each of a plurality of sentences in the document into a plurality of portions based on a set of rules that specify how to divide up each of the plurality of sentences based on content of the plurality of sentences, and avoid disclosure of any of the plurality of sentences in its entirety to a same human translator; third program instructions to translate a first portion of the portions of each of the plurality of sentences to form an initially translated first portion, using a translation engine; fourth program instructions to send the portions of each of the plurality of sentences to a plurality of respective, human translators, for correction and translation, wherein none of the plurality of human translators is sent any of the plurality of sentences in its entirety for translation, wherein the fourth program instructions to send the portions of each of the plurality of sentences to the plurality of respective, human translators, include program instructions to send the initially translated first portion along with the first portion; and fifth program instructions to combine the translations for the respective portions to form consolidated translations for each of the plurality of sentences in response to receiving translations from the plurality of human translators for respective portions of each of the plurality of sentences, and update at least one model used by the translation engine based on corrections made by the human translators, wherein the first program instructions, the second program instructions, the third program instructions, the fourth program instructions, and the fifth program instructions are stored on the computer-readable storage device and executed by the CPU via the computer-readable memory.
9. A computer system for translating a natural-language text document, the computer system comprising: a CPU, a computer-readable storage device, and a computer-readable memory; first program instructions to receive the natural-language text document for translation; second program instructions to divide each of a plurality of sentences in the document into a plurality of portions based on a set of rules that specify how to divide up each of the plurality of sentences based on content of the plurality of sentences, and avoid disclosure of any of the plurality of sentences in its entirety to a same human translator; third program instructions to translate a first portion of the portions of each of the plurality of sentences to form an initially translated first portion, using a translation engine; fourth program instructions to send the portions of each of the plurality of sentences to a plurality of respective, human translators, for correction and translation, wherein none of the plurality of human translators is sent any of the plurality of sentences in its entirety for translation, wherein the fourth program instructions to send the portions of each of the plurality of sentences to the plurality of respective, human translators, include program instructions to send the initially translated first portion along with the first portion; and fifth program instructions to combine the translations for the respective portions to form consolidated translations for each of the plurality of sentences in response to receiving translations from the plurality of human translators for respective portions of each of the plurality of sentences, and update at least one model used by the translation engine based on corrections made by the human translators, wherein the first program instructions, the second program instructions, the third program instructions, the fourth program instructions, and the fifth program instructions are stored on the computer-readable storage device and executed by the CPU via the computer-readable memory. 12. The computer system of claim 9 , wherein the fourth program instructions to send the portions of each of the plurality of sentences to the plurality of respective, human translators, comprise: program instructions to detect a presence of potential human translators at translation systems; and program instructions to use the presence of potential human translators detected from the translation systems to determine the plurality of human translators.