> For the complete documentation index, see [llms.txt](https://docs.wproofreader.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wproofreader.com/v6.12.0/faq/technical.md).

# Technical

- [Compatibility and support](https://docs.wproofreader.com/v6.12.0/faq/technical/compatibility-and-support.md)
- [Can I run WebSpellChecker software on Azure App Service?](https://docs.wproofreader.com/v6.12.0/faq/technical/compatibility-and-support/can-i-run-webspellchecker-software-on-azure-app-service.md)
- [Does WebSpellChecker provide support for CKEditor v5?](https://docs.wproofreader.com/v6.12.0/faq/technical/compatibility-and-support/does-webspellchecker-provide-support-for-ckeditor-v5.md)
- [WProofreader doesn't work in Zen browser](https://docs.wproofreader.com/v6.12.0/faq/technical/compatibility-and-support/wproofreader-doesnt-work-in-zen-browser.md)
- [Can I use your product through the browser or how can I install it?](https://docs.wproofreader.com/v6.12.0/faq/technical/compatibility-and-support/can-i-use-your-product-through-the-browser-or-how-can-i-install-it.md)
- [SCAYT plugin for CKEditor 4](https://docs.wproofreader.com/v6.12.0/faq/technical/scayt-plugin-for-ckeditor-4.md)
- [What is the difference between SCAYT plugin for CKEditor 4 and WProofreader?](https://docs.wproofreader.com/v6.12.0/faq/technical/scayt-plugin-for-ckeditor-4/what-is-the-difference-between-scayt-plugin-for-ckeditor-4-and-wproofreader.md)
- [How to disable the WSC plugin in CKEditor 4?](https://docs.wproofreader.com/v6.12.0/faq/technical/scayt-plugin-for-ckeditor-4/how-to-disable-the-wsc-plugin-in-ckeditor-4.md)
- [How to remove the SCAYT plugin in CKEditor 4?](https://docs.wproofreader.com/v6.12.0/faq/technical/scayt-plugin-for-ckeditor-4/how-to-remove-the-scayt-plugin-in-ckeditor-4.md)
- [Caching](https://docs.wproofreader.com/v6.12.0/faq/technical/caching.md)
- [Can we control the cache limit? Is it configurable?](https://docs.wproofreader.com/v6.12.0/faq/technical/caching/can-we-control-the-cache-limit-is-it-configurable.md)
- [Can we turn off/on the cache?](https://docs.wproofreader.com/v6.12.0/faq/technical/caching/can-we-turn-off-on-the-cache.md)
- [How do I enable caching different from the default 10 MB of cache on AppServer for 10000 suggestions](https://docs.wproofreader.com/v6.12.0/faq/technical/caching/how-do-i-enable-caching-different-from-the-default-10-mb-of-cache-on-appserver-for-10000-suggestions.md)
- [Is caching applicable for both Spelling check and grammar check?](https://docs.wproofreader.com/v6.12.0/faq/technical/caching/is-caching-applicable-for-both-spelling-check-and-grammar-check.md)
- [Is the cache limit size in MB specified per locale or is it an overall amount?](https://docs.wproofreader.com/v6.12.0/faq/technical/caching/is-the-cache-limit-size-in-mb-specified-per-locale-or-is-it-an-overall-amount.md)
- [Which caching strategy do you use? Are LRU or LFU strategies supported?](https://docs.wproofreader.com/v6.12.0/faq/technical/caching/which-caching-strategy-do-you-use-are-lru-or-lfu-strategies-supported.md)
- [WProofreader](https://docs.wproofreader.com/v6.12.0/faq/technical/wproofreader.md)
- [How would keyboard users be able to access the spell check suggestions?](https://docs.wproofreader.com/v6.12.0/faq/technical/wproofreader/how-would-keyboard-users-be-able-to-access-the-spell-check-suggestions.md)
- [How to disable Cloud WProofreader plugin for CKEditor 5 while unit tests?](https://docs.wproofreader.com/v6.12.0/faq/technical/wproofreader/how-to-disable-cloud-wproofreader-plugin-for-ckeditor-5-while-unit-tests.md)
- [How WProofreader works if the backend is unavailable?](https://docs.wproofreader.com/v6.12.0/faq/technical/wproofreader/how-wproofreader-works-if-the-backend-is-unavailable.md)
- [Is there any way to change the hover behavior to right click in WProofreader?](https://docs.wproofreader.com/v6.12.0/faq/technical/wproofreader/is-there-any-way-to-change-the-hover-behavior-to-right-click-in-wproofreader.md)
- [What is the mechanism of errors highlighting by WProofreader and SCAYT plugin for CKEditor 4?](https://docs.wproofreader.com/v6.12.0/faq/technical/wproofreader/what-is-the-mechanism-of-errors-highlighting-by-wproofreader-and-scayt-plugin-for-ckeditor-4.md)
- [API](https://docs.wproofreader.com/v6.12.0/faq/technical/api.md)
- [What is minimum guaranteed SLA for Cloud API?](https://docs.wproofreader.com/v6.12.0/faq/technical/api/what-is-minimum-guaranteed-sla-for-cloud-api.md)
- [What is the max limit of an API request?](https://docs.wproofreader.com/v6.12.0/faq/technical/api/what-is-the-max-limit-of-an-api-request.md)
- [What’s the average response time of a Cloud API request?](https://docs.wproofreader.com/v6.12.0/faq/technical/api/whats-the-average-response-time-of-a-cloud-api-request.md)
- [Languages](https://docs.wproofreader.com/v6.12.0/faq/technical/languages.md)
- [AI-based language doesn't provide suggestions for non-existent words](https://docs.wproofreader.com/v6.12.0/faq/technical/languages/ai-based-language-doesnt-provide-suggestions-for-non-existent-words.md)
- [Why WProofreader auto detect language doesn't work for small piece of texts?](https://docs.wproofreader.com/v6.12.0/faq/technical/languages/why-wproofreader-auto-detect-language-doesnt-work-for-small-piece-of-texts.md)
- [Engines prioritization while using AI-check kit while proofreading](https://docs.wproofreader.com/v6.12.0/faq/technical/languages/engines-prioritization-while-using-ai-check-kit-while-proofreading.md)
- [Which spell and grammar check engines are in use?](https://docs.wproofreader.com/v6.12.0/faq/technical/languages/which-spell-and-grammar-check-engines-are-in-use.md)
- [How to change the list of languages?](https://docs.wproofreader.com/v6.12.0/faq/technical/languages/how-to-change-the-list-of-languages.md)
- [Security](https://docs.wproofreader.com/v6.12.0/faq/technical/security.md)
- [Are you OWASP 10 compliant?](https://docs.wproofreader.com/v6.12.0/faq/technical/security/are-you-owasp-10-compliant.md)
- [Does CVE-2021-44228 (Log4j 2 vulnerability) affect WebSpellChecker products?](https://docs.wproofreader.com/v6.12.0/faq/technical/security/does-cve-2021-44228-log4j-2-vulnerability-affect-webspellchecker-products.md)
- [Do you implement any data encryption?](https://docs.wproofreader.com/v6.12.0/faq/technical/security/do-you-implement-any-data-encryption.md)
- [WebSpellChecker security advisory WSC-SA-2026-001](https://docs.wproofreader.com/v6.12.0/faq/technical/security/webspellchecker-security-advisory-wsc-sa-2026-001.md): Security advisory WSC-SA-2026-001 covering CVE-2026-40682, CVE-2026-42027, and CVE-2026-42440 in Apache OpenNLP bundled with WProofreader. Status: not exploitable, no customer action required.